[jdk8u-dev] RFR: 8293540: [Metrics] Incorrectly detected resource limits with additional cgroup fs mounts

[Jonathan Dowland]

This is a backport of 8293540 to jdk8u-dev for cgroups v2 support.

Unclean: new test (TestDockerBasic.java) needed adjustments for the 8u test library paths and available methods.

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Depends on: https://git.openjdk.org/jdk8u-dev/pull/220

Commit messages:
 - Fix test for 8u: lib paths and buildJdkDockerImage method
 - 8293540: [Metrics] Incorrectly detected resource limits with additional cgroup fs mounts

Changes: https://git.openjdk.org/jdk8u-dev/pull/221/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=221&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293540
  Stats: 180 lines in 6 files changed: 143 ins; 23 del; 14 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/221.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/221/head:pull/221

PR: https://git.openjdk.org/jdk8u-dev/pull/221